Caleffi 3 Zone Valve Control w/ Priority

Function The ZVR series is a zone valve and boiler operating control for multiple zone hydronic heating systems. The ZVR series interfaces with low voltage thermostats, or any other low voltage controllers having a switching action. The ZVR series controls up to 6 zone valves, depending on model selected. In addition, a system pump and secondary pump is turned on whenever any zone calls for heat. A DHW primary pump can also be operated. LED indicators provide functional status and easy system troubleshooting. Features Compatible with 2, 3 and 4-wire thermostats or other low voltage controllers with switching action 120 VAC input Heavy duty, sealed relays 3 pump outputs (120 VAC/5 A) and 3 to 6 (model dependent) zone valve outputs (24 V) Zone priority selectable with 1-hour time-out feature Convenient R,W,C and T,T,COM dual labeling at thermostat terminals System pump status (on/off) during priority selectable DHW (ZR/ZC) dry contacts rated for switching line voltage Replaceable, snap-fit 40 VA transformer ...